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My problem is my 1st video card was from nvidia and nvidia driver was installed.I sold that card and buyed Radeon card.Now i cant boot into the system, as it is looking for nvidia card.After booting normally when it trying to switch to gui loging, it's hanging.Please tell me how to uninstall the nvidia driver and install radeon(command line).And after uninstall will it be back to normal Gui logging. Please write commands too . And if u think its not of the driver, please specify your reason, and solution too.

hi guys,
My problem is my 1st video card was from nvidia and nvidia driver was installed.I sold that card and buyed Radeon card.Now i cant boot into the system, as it is looking for nvidia card.After booting normally when it trying to switch to gui loging, it's hanging.Please tell me how to uninstall the nvidia driver and install radeon(command line).And after uninstall will it be back to normal Gui logging. Please write commands too . And if u think its not of the driver, please specify your reason, and solution too.
Linux : Debian

Did you try going to the ATI website, selecting your particular Radeon card from the "Find a Driver" link on the right, and following the instructions?

You don't say what model Radeon card, what version of Debian, or what architecture (32 or 64 bit?), so it's hard to be specific. You can also just edit the /etc/X11/xorg.conf file, and change the line that says something like "Driver "nvidia"", to read "Driver "vesa"", or vga, and see if it'll work.

Installing the driver from AMDs website is in my eyes a no-go in Debian, at least if you are new to Linux.
The way I would go:
- Start Debian in single user mode
- Delete the /etc/X11/xorg.conf file
- Restart the system, you now should get a GUI login.
- Use your favorite package managing front-end to remove the Nvidia packages and install the AMD packages.
- Launch the command

Code:

aticonfig --initial

- Reboot and you should be fine

Keep in mind that for some newer AMD cards the driver in Debian stable may be to old, so that you have to use the drivers from Testing, Unstable or helper scripts like smxi.

Installing the driver from AMDs website is in my eyes a no-go in Debian, at least if you are new to Linux.

Really? I'm not familiar with Debian, but from when I had ATI cards, the procedure would (at least if you had the kernel source installed), compile it for you via the installation utility. I just updated my nVidia drivers a few minutes ago (kernel update), and it was painless.

If you use the binary drivers from the website you are bypassing the package manager. The next time you get an update for the kernel (and xorg? Don't remember anymore) X will not start and you have to re-install the the driver (so that the installer is building a new kernel module), which really can confuse a newbie. If you use the drivers from the repositories the package manager will take care of that automatically.

If you use the binary drivers from the website you are bypassing the package manager. The next time you get an update for the kernel (and xorg? Don't remember anymore) X will not start and you have to re-install the the driver (so that the installer is building a new kernel module), which really can confuse a newbie. If you use the drivers from the repositories the package manager will take care of that automatically.

Yes...very good point.

I just automatically 'know' to re-install/update the drivers whenever I have a kernel update, so I didn't think of it that way. A newbie wouldn't (necessarily) think of that, and if auto-updates are turned on, it'll be working fine...until the next reboot. Going your route would be much better.